CLEARSIGN TECHNOLOGIES CORP

Ticker: CLIR CUSIP: 185064102 Class: COM

VANGUARD GROUP INC's Holding History (CIK: 0000102909)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 1,322,980 Value ($000) $736 Avg Close $0.80 Range $0.55 - $1.12

Q3 2025

Shares 1,277,584 Value ($000) $985 Avg Close $0.59 Range $0.46 - $0.95

Q2 2025

Shares 1,165,417 Value ($000) $623 Avg Close $0.60 Range $0.46 - $0.78

Q1 2025

Shares 1,130,730 Value ($000) $848 Avg Close $1.00 Range $0.67 - $1.60

Q4 2024

Shares 1,115,355 Value ($000) $1,606 Avg Close $0.99 Range $0.76 - $1.72

Q3 2024

Shares 1,115,355 Value ($000) $948 Avg Close $0.80 Range $0.65 - $0.98

Q2 2024

Shares 1,115,355 Value ($000) $931 Avg Close $0.82 Range $0.62 - $1.03

Q1 2024

Shares 1,115,355 Value ($000) $1,076 Avg Close $1.06 Range $0.90 - $1.32

Q4 2023

Shares 1,101,164 Value ($000) $1,222 Avg Close $1.04 Range $0.75 - $1.72

Q3 2023

Shares 1,074,822 Value ($000) $1,172 Avg Close $1.16 Range $0.90 - $1.51

Q2 2023

Shares 1,067,733 Value ($000) $1,399 Avg Close $1.18 Range $0.79 - $1.75

Q1 2023

Shares 1,067,733 Value ($000) $852 Avg Close $0.76 Range $0.50 - $0.88

Q4 2022

Shares 1,067,733 Value ($000) $572 Avg Close $0.70 Range $0.50 - $0.98

Q3 2022

Shares 1,070,516 Value ($000) $982 Avg Close $1.07 Range $0.82 - $1.34

Q2 2022

Shares 1,074,381 Value ($000) $1,300 Avg Close $1.29 Range $1.00 - $1.77

Q1 2022

Shares 1,076,681 Value ($000) $1,755 Avg Close $1.30 Range $1.00 - $1.78

Q4 2021

Shares 1,076,681 Value ($000) $1,486 Avg Close $1.66 Range $1.19 - $2.68

Q3 2021

Shares 1,082,978 Value ($000) $2,166 Avg Close $3.35 Range $1.93 - $4.95

Q2 2021

Shares 1,082,978 Value ($000) $5,198 Avg Close $4.73 Range $3.81 - $5.98

Q1 2021

Shares 1,076,210 Value ($000) $6,113 Avg Close $4.38 Range $2.66 - $6.00

Q4 2020

Shares 818,817 Value ($000) $2,399 Avg Close $2.60 Range $2.20 - $3.61

Q3 2020

Shares 703,615 Value ($000) $1,590 Avg Close $2.29 Range $1.96 - $3.03

Q2 2020

Shares 591,758 Value ($000) $1,231 Avg Close $0.95 Range $0.45 - $4.11

Q1 2020

Shares 597,610 Value ($000) $431 Avg Close $0.82 Range $0.35 - $1.09

Q4 2019

Shares 597,710 Value ($000) $456 Avg Close $0.97 Range $0.71 - $1.42

Q3 2019

Shares 597,710 Value ($000) $717 Avg Close $1.24 Range $1.06 - $1.50

Q2 2019

Shares 579,828 Value ($000) $667 Avg Close $0.92 Range $0.75 - $1.49

Q1 2019

Shares 357,628 Value ($000) $321 Avg Close $1.10 Range $0.85 - $1.40

Q4 2018

Shares 356,928 Value ($000) $364 Avg Close $1.43 Range $0.77 - $1.80

Q3 2018

Shares 794,321 Value ($000) $1,271 Avg Close $1.94 Range $1.40 - $2.25

Q2 2018

Shares 729,488 Value ($000) $1,459 Avg Close $1.94 Range $1.65 - $2.25

Q1 2018

Shares 666,377 Value ($000) $1,350 Avg Close $2.44 Range $1.80 - $3.60

Q4 2017

Shares 617,499 Value ($000) $2,223 Avg Close $3.26 Range $1.75 - $4.70

Q3 2017

Shares 347,557 Value ($000) $1,234 Avg Close $3.33 Range $2.75 - $4.15

Q2 2017

Shares 336,914 Value ($000) $1,281 Avg Close $3.67 Range $3.30 - $4.30

Q1 2017

Shares 329,720 Value ($000) $1,286 Avg Close $3.61 Range $3.00 - $4.60

Q4 2016

Shares 319,258 Value ($000) $1,086 Avg Close $4.62 Range $3.16 - $6.13

Q3 2016

Shares 347,768 Value ($000) $2,086 Avg Close $4.97 Range $3.98 - $6.24

Q2 2016

Shares 335,598 Value ($000) $1,681 Avg Close $4.41 Range $3.75 - $5.58

Q1 2016

Shares 329,871 Value ($000) $1,316 Avg Close $3.69 Range $2.68 - $5.01

Q4 2015

Shares 320,145 Value ($000) $1,552 Avg Close $5.31 Range $4.16 - $6.54

Q3 2015

Shares 311,845 Value ($000) $1,930 Avg Close $5.03 Range $3.22 - $8.09

Q2 2015

Shares 301,974 Value ($000) $1,634 Avg Close $5.38 Range $4.63 - $6.30

Q1 2015

Shares 289,300 Value ($000) $1,530 Avg Close $6.22 Range $4.51 - $7.86

Q4 2014

Shares 217,000 Value ($000) $1,591 Avg Close $6.73 Range $5.08 - $9.49

Q3 2014

Shares 213,800 Value ($000) $1,428 Avg Close $7.66 Range $5.07 - $9.64

Q2 2014

Shares 204,725 Value ($000) $1,879 Avg Close $9.27 Range $7.51 - $11.00

Q1 2014

Shares 200,976 Value ($000) $2,193 Avg Close $10.22 Range $7.76 - $13.87

Q4 2013

Shares 151,708 Value ($000) $1,737 Avg Close $7.65 Range $5.56 - $12.49

Q3 2013

Shares 135,214 Value ($000) $940 Avg Close $8.33 Range $6.48 - $9.93

Q2 2013

Shares 131,184 Value ($000) $1,144 Avg Close $8.40 Range $6.35 - $11.21

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,322,980	$736	$0.80	$0.55 - $1.12
Q3 2025	1,277,584	$985	$0.59	$0.46 - $0.95
Q2 2025	1,165,417	$623	$0.60	$0.46 - $0.78
Q1 2025	1,130,730	$848	$1.00	$0.67 - $1.60
Q4 2024	1,115,355	$1,606	$0.99	$0.76 - $1.72
Q3 2024	1,115,355	$948	$0.80	$0.65 - $0.98
Q2 2024	1,115,355	$931	$0.82	$0.62 - $1.03
Q1 2024	1,115,355	$1,076	$1.06	$0.90 - $1.32
Q4 2023	1,101,164	$1,222	$1.04	$0.75 - $1.72
Q3 2023	1,074,822	$1,172	$1.16	$0.90 - $1.51
Q2 2023	1,067,733	$1,399	$1.18	$0.79 - $1.75
Q1 2023	1,067,733	$852	$0.76	$0.50 - $0.88
Q4 2022	1,067,733	$572	$0.70	$0.50 - $0.98
Q3 2022	1,070,516	$982	$1.07	$0.82 - $1.34
Q2 2022	1,074,381	$1,300	$1.29	$1.00 - $1.77
Q1 2022	1,076,681	$1,755	$1.30	$1.00 - $1.78
Q4 2021	1,076,681	$1,486	$1.66	$1.19 - $2.68
Q3 2021	1,082,978	$2,166	$3.35	$1.93 - $4.95
Q2 2021	1,082,978	$5,198	$4.73	$3.81 - $5.98
Q1 2021	1,076,210	$6,113	$4.38	$2.66 - $6.00
Q4 2020	818,817	$2,399	$2.60	$2.20 - $3.61
Q3 2020	703,615	$1,590	$2.29	$1.96 - $3.03
Q2 2020	591,758	$1,231	$0.95	$0.45 - $4.11
Q1 2020	597,610	$431	$0.82	$0.35 - $1.09
Q4 2019	597,710	$456	$0.97	$0.71 - $1.42
Q3 2019	597,710	$717	$1.24	$1.06 - $1.50
Q2 2019	579,828	$667	$0.92	$0.75 - $1.49
Q1 2019	357,628	$321	$1.10	$0.85 - $1.40
Q4 2018	356,928	$364	$1.43	$0.77 - $1.80
Q3 2018	794,321	$1,271	$1.94	$1.40 - $2.25
Q2 2018	729,488	$1,459	$1.94	$1.65 - $2.25
Q1 2018	666,377	$1,350	$2.44	$1.80 - $3.60
Q4 2017	617,499	$2,223	$3.26	$1.75 - $4.70
Q3 2017	347,557	$1,234	$3.33	$2.75 - $4.15
Q2 2017	336,914	$1,281	$3.67	$3.30 - $4.30
Q1 2017	329,720	$1,286	$3.61	$3.00 - $4.60
Q4 2016	319,258	$1,086	$4.62	$3.16 - $6.13
Q3 2016	347,768	$2,086	$4.97	$3.98 - $6.24
Q2 2016	335,598	$1,681	$4.41	$3.75 - $5.58
Q1 2016	329,871	$1,316	$3.69	$2.68 - $5.01
Q4 2015	320,145	$1,552	$5.31	$4.16 - $6.54
Q3 2015	311,845	$1,930	$5.03	$3.22 - $8.09
Q2 2015	301,974	$1,634	$5.38	$4.63 - $6.30
Q1 2015	289,300	$1,530	$6.22	$4.51 - $7.86
Q4 2014	217,000	$1,591	$6.73	$5.08 - $9.49
Q3 2014	213,800	$1,428	$7.66	$5.07 - $9.64
Q2 2014	204,725	$1,879	$9.27	$7.51 - $11.00
Q1 2014	200,976	$2,193	$10.22	$7.76 - $13.87
Q4 2013	151,708	$1,737	$7.65	$5.56 - $12.49
Q3 2013	135,214	$940	$8.33	$6.48 - $9.93
Q2 2013	131,184	$1,144	$8.40	$6.35 - $11.21